Hi,
On Apr 24, 2011, at 2:58 PM, Justin Ruggles <[email protected]> wrote:
> I was able to get this working. So after the change, here is what the
> ffmpeg behavior would be when using the request_sample_fmt version of
> the patch.
>
> $ ffmpeg -i in.ac3 -acodec pcm_f32le -y out.wav
> decoder initialized to s16 during av_find_stream_info()
> warning about incompatible sample format
> encoder initialized to flt
> decoder request_sample_fmt set to flt
> decoder initialized to flt
> message about the input stream changing format
>
> $ ffmpeg -i in.ac3 -acodec pcm_f64le -y out.wav
> decoder initialized to s16 during av_find_stream_info()
> warning about incompatible sample format
> encoder initialized to dbl
> decoder request_sample_fmt set to flt
> decoder initialized to flt
> message about the input stream changing format
> ffmpeg converts from flt to dbl
>
> $ ffmpeg -request_sample_fmt flt -i in.ac3 -acodec pcm_f32le -y out.wav
> decoder initialized to flt during av_find_stream_info()
> encoder initialized to flt
> decoder initialized to flt
>
> $ ffmpeg -request_sample_fmt flt -i in.ac3 -acodec pcm_s16le -y out.wav
> decoder initialized to flt during av_find_stream_info()
> warning about incompatible sample format
> encoder initialized to s16
> decoder initialized to flt
> ffmpeg converts float to s16
>
> $ ffmpeg -request_sample_fmt s16 -i in.ac3 -acodec pcm_f32le -y out.wav
> decoder initialized to s16 during av_find_stream_info()
> warning about incompatible sample format
> encoder initialized to flt
> decoder initialized to s16
> ffmpeg converts s16 to flt
Very sweet! ('Nuf said!)
I assume default (ffmpeg -i f.ac3 -f null -) is still int16? Or say, what
happens when converting to a fmt suppprting both int as well as flt?
Ronald
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